Re: Real-life examples of lexical binding in Emacs Lisp

[Stefan Monnier <monnier@iro.umontreal.ca>]

>> However, I would argue that for global variables, lexical binding would
>> be useful too, even by default.

I'm not sure what that means.  But you can set a global value to
a variable without declaring it as dynamically scoped:

    (setq my-lex-var 3)

Inside Emacs we also have a few global vars (e.g. `pi' and `argv') which
we would want to declare with something like defvar for various reasons
(providing a docstring, recording where is the declaration, etc...) yet
we don't want them to be dynamically scoped.

For `pi' we just used `setq', and for `argv' we used defvar followed by
an ugly hack called internal-make-var-non-special.


        Stefan